Step1:Beat butter evenly with a hand beater while blowing it with a hair dryer, then add sugar powder and salt to beat butter until it turns white, then sift the prepared cooked egg yolk into the butter, then sift the low flour and corn starch into the butter, knead and knead it by hand, wrap it with plastic wrap, refrigerate it for an hour, then take it out and divide it into small seasons with big thumb A nice pattern appears when you press it. Preheat the oven at 170 ℃ and bake for 15 minute
Cooking tips:There are skills in making delicious dishes.